<template>
<div>
<nav-bar>
  <div slot="left" class="back" @click="backclick">
  <img src="~assets/img/common/back.svg" alt="">
  </div>
  <div slot="center" class="title">
    <div v-for="(item, index) in titles" 
    :key="item" 
    class="item-title" 
    :class="{active: index === currentIndex}" @click="itemclick(index)">
    {{item}}
    </div>
  </div>
</nav-bar>
</div>
</template>

<script>
import NavBar from 'components/common/navbar/NavBar'
  export default {
  name: "DetailNavBar",
  data() {
    return {
      titles: ['商品','参数','评论','推荐'],
      currentIndex: 0
    }
  },
  components: {
    NavBar
  },
  methods: {
    itemclick(index) {
      this.currentIndex = index;
      this.$emit('itemclick', index);
    },
    backclick() {
      this.$router.go(-1);
    }
  }
}

</script>

<style scoped>
.title {
   display: flex;
   font-size: 14px;
 }
.item-title {
   flex: 1;
 }
.active {
  color: var(--color-high-text)
}
.back img {
  margin-top: 12px;
}

</style>